The Call Object in Vapi provides a comprehensive set of properties to manage and understand phone calls.

The most important attributes are:

type: Specifies the type of call (e.g., inboundPhoneCall, outboundPhoneCall, webCall).
phoneCallProvider: Indicates the provider of the call (e.g., twilio, vonage).
phoneCallTransport: The transport medium of the phone call (e.g., sip, pstn).
status: Current status of the call (e.g., queued, ringing, in-progress, forwarding, ended).
endedReason: Reason for the call's end (various values including assistant-error, assistant-not-found, etc.).
maxDurationSeconds: Maximum duration of the call in seconds.
id: Unique identifier for the call.
orgId: Unique identifier for the organization that the call belongs to.
createdAt, updatedAt, startedAt, endedAt: ISO 8601 date-time strings for creation, last update, start, and end times of the call, respectively.
cost, costBreakdown: Cost of the call in USD and its detailed breakdown.
transcript: Transcript of the call.
recordingUrl, stereoRecordingUrl: URLs for the recording of the call in mono and stereo.
summary: Summary of the call.
messages: Array of messages spoken during the call.
phoneCallProviderId: ID of the call as provided by the phone number service.
phoneCallProviderBypassEnabled: Indicates if Vapi directly initiates calls or if it's bypassed for external handling.
phoneCallProviderDetails: Details for bridging the assistant into the external call if phoneCallProviderBypassEnabled is true.
webCallUrl, webCallSipUri: URL and SIP URI of the call for web-based calls.
forwardedPhoneNumber: The phone number the call was forwarded to.
assistantId, assistant: ID and object of the assistant used for the call.
customerId, customer: ID and object of the customer involved in the call.
phoneNumberId, phoneNumber: ID and object of the phone number used for the call.
metadata: Metadata associated with the call.